The simultaneous arrival of graded depolarization and a graded hyperpolarization of equal but opposite magnitude at a particular location on the dendritic membrane is likely to cancel the effects of each other and no change will occur in the membrane potential.
Explanation:
Graded potentials lead to temporary minor changes in the membrane potential associated with neuron’s dendrites. The amount of change caused depends upon the size and duration of the stimulus. These can be depolarizing or hyperpolarizing.
Graded depolarization occurs due to the entry of sodium or calcium ions; whereas, graded hyperpolarization occurs due to exit of potassium ions or entry of chloride ions.
When equal but opposite magnitude of graded depolarization and hyperpolarization occurs at a particular dendride of a neuron, the positive and negative charges get neutralized causing little or no effect on the total membrane potential.
It occurs in plants and animals and creates energy for animals and plants.
Animals: The energy is called atp
Plants: Sunlight
Answer:
The correct answer would be d) bacteria that make human insulin and a Bt corn plant.
An organism that contains and/or expresses a transgene or foreign gene is termed transgenic organism.
Bacteria that make human insulin contain and express human genes which code for A and B chain of insulin.
Similarly, Bt cotton is also a transgenic organism as it contains and expresses cry gene isolated from bacterium <em>Bacillus thuringiensis. </em>It provides pest resistance to the plant.
Thus, option d contains a pair of transgenic organisms.
Answer:
D. In autopolyploidy, one parental species contributes to the polyploidy; in allopolyploidy, two parental species contribute to the polyploidy.
Explanation:
Autopolyploidy is the polyploidy that arises when the organisms have more than two complete sets of the same genome. For example, if a diploid species is represented as "AA", its autopolyploid with four complete sets of the genome can be represented as "AAAA".
On the other hand, allopolyploidy occurs when the polyploid carries more than two complete sets of the genome from separate species. For example, if two diploid species are represented as "AA" and "BB", their allopolyploid with four complete sets of the genome can be represented as "AABB".
